CN102880318A - Handwriting pen and capacitive pressure sensing element thereof - Google Patents
Handwriting pen and capacitive pressure sensing element thereof Download PDFInfo
- Publication number
- CN102880318A CN102880318A CN2012103178257A CN201210317825A CN102880318A CN 102880318 A CN102880318 A CN 102880318A CN 2012103178257 A CN2012103178257 A CN 2012103178257A CN 201210317825 A CN201210317825 A CN 201210317825A CN 102880318 A CN102880318 A CN 102880318A
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- China
- Prior art keywords
- sheet metal
- auxiliary spring
- writing pencil
- flexible member
- electrode
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
- G06F3/03545—Pens or stylus
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Position Input By Displaying (AREA)
Abstract
The invention discloses a capacitive pressure sensing element. The capacitive pressure sensing element comprises a body, a first electrode, a second electrode, a first metal piece, a second metal piece, an elastic element and a sensing layer, wherein the first electrode and the second electrode are arranged at the first end of the body and are respectively connected with the anode and the cathode of a power supply; the first metal piece is electrically connected with the first electrode; the second metal piece is fixedly connected with the second end of the body; the elastic element is electrically connected with the second electrode and the second metal piece; the sensing layer is fixedly connected with the first end of the body; when the elastic element is positioned at an initial position, the sensing layer is positioned between the first metal piece and the elastic element; and when the first end of the body is pressed, the first metal piece moves and partially exceeds the sensing layer to be opposite to the second metal piece, and sensing capacitance is formed between the opposite surfaces of the first metal piece and the second metal piece. The invention also provides a handwriting pen provided with the capacitive pressure sensing element. According to the capacitive pressure sensing element provided by the invention, corresponding sensing capacitance is generated because of the change of pressure, so that the problem that a pressure sensor is easy to damage in the prior art is solved.
Description
Technical field
The present invention relates to the pressure sensitive technical field, relate in particular to a kind of writing pencil and capacitive forced induction element thereof.
Background technology
Progress and development along with electronic product, electronic equipment with hand-write input function is used for the electronic equipments such as personal digital assistant (PDA), mobile phone, palm PC, flat computer more and more widely, the user can use the writing pencil contacting electronic equipments, realizes the handwriting input operation.
Existing writing pencil mostly has pressure transducer, triggers electronic equipment when carrying out handwriting input and shows corresponding input content.Pressure transducer generally all adopts force sensing resistance, and the resistance value of force sensing resistance changes along with the variation that applies pressure thereon, thereby determines push action by the change of sensing resistor value.Yet the intrinsic larger temperature drift of piezoresistive pressure sensor makes it that malfunctioning situation of sensing easily occur under the very large environment of range of temperature, and sensing element easily exists component abrasion, aging situation through repeatedly using.
Summary of the invention
In view of this, be necessary to provide a kind of writing pencil and capacitive forced induction element thereof, to increase the service life and to improve sensing sensitivity.
The invention provides a kind of writing pencil, comprise control module and communication unit, this communication unit is used for communicating to connect with an electronic installation with display screen, and this writing pencil also comprises:
The capacitive forced induction element, comprise body, be arranged at this body first end and the first electrode that is connected with negative pole with a positive source respectively and the second electrode, with the first sheet metal, flexible member and the second sheet metal that this first electrode is electrically connected, this flexible member is electrically connected between this second electrode and this second sheet metal.When this flexible member is in initial position, the area that this first sheet metal is relative with this second sheet metal is a predetermined value, when the free end of this second sheet metal is contacted with this display screen, this second sheet metal is under pressure and near the motion of the direction of this body first end and compress this flexible member, make this first sheet metal area change relative with this second sheet metal and greater than this predetermined value, thereby between this first sheet metal and this second sheet metal opposite face, form an inductance capacitance.
Positioning unit is used for that this control module of response detects the inductance capacitance that this capacitive forced induction element produces and the trigger pip that produces and to detecting the current position of this writing pencil, to obtain positional information.
Storage unit is for the coordinate system corresponding to display screen of pre-stored this electronic installation.
This control module is used for obtaining the coordinate system that this storage unit is stored, and determines that according to the positional information that this positioning unit is determined this positional information is positioned at the coordinate of this coordinate system.
The control that this communication unit also is used for this control module of response sends this coordinate to this electronic installation, triggers this electronic installation and determines the position that this writing pencil contacts with this display screen according to this coordinate, and show this position.
The present invention also provides a kind of capacitive forced induction element, comprise body and the first electrode and the second electrode that are connected this body first end and are connected with negative pole with a positive source respectively, this capacitive forced induction element also comprises the first sheet metal that is electrically connected with this first electrode, flexible member and the second sheet metal, this flexible member is electrically connected between this second electrode and this second sheet metal, when this flexible member is in initial position, the area that this first sheet metal is relative with this second sheet metal is a predetermined value, when an object is pressed the free end of this second sheet metal and made this second sheet metal to moving near the direction of this body first end and compressing this flexible member, make this first sheet metal area change relative with this second sheet metal and greater than this predetermined value, thereby between this first sheet metal and this second sheet metal opposite face, form an inductance capacitance.
With respect to prior art, writing pencil provided by the invention and capacitive forced induction element thereof, contact with an electronics by writing pencil and to press this writing pencil, so that this capacitive forced induction element produces corresponding inductance capacitance owing to the variation of pressure, this writing pencil is detected its current location when producing inductance capacitance, and shown by electronic installation and the current location of this writing pencil realize the writing pencil hand-write input function.Utilize capacitive forced induction element of the present invention to solve the flimsy problem of the pressure transducer that uses in the prior art.
Description of drawings
Fig. 1 is the structural representation of capacitive forced induction element in the embodiment of the present invention.
Fig. 2 is the structural representation of the capacitive forced induction element operation state of Fig. 1.
Fig. 3 is the functional block diagram that is applied to the writing pencil of an electronic installation in the embodiment of the present invention.
The main element symbol description
| The capacitive forced |
10 |
| |
11 |
| |
110 |
| The |
111 |
| The |
112 |
| The |
113 |
| The |
12 |
| The |
13 |
| |
130 |
| |
131 |
| The |
14 |
| The |
15 |
| |
16 |
| |
17 |
| The first |
170 |
| The second |
171 |
| |
172 |
| |
18 |
| Writing |
20 |
| |
21 |
| |
22 |
| |
23、32 |
| |
30 |
| |
31 |
| |
33 |
Following embodiment further specifies the present invention in connection with above-mentioned accompanying drawing.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
See also Fig. 1, be the structural representation of capacitive forced induction element in the embodiment of the present invention, this capacitive forced induction element 10 comprises body 11, the first sheet metal 12, the second sheet metal 13, the first electrode 14, the second electrode 15, flexible member 16, auxiliary spring 17 and inductive layer 18.Wherein, this first electrode 14 and the second electrode 15 are arranged at the first end 110 of body 11, and are connected with negative pole with the positive pole of a power supply (not shown) respectively.In the present embodiment, this flexible member 16 is a spring.One end of this first sheet metal 12 and the first electrode 14 are electrically connected and obtain the voltage that this first electrode 14 provides, and an end of this flexible member 16 and the second electrode 15 are electrically connected, and relative with the first sheet metal 12.This second sheet metal 13 comprises a stiff end 130 and a free end 131, and wherein, the stiff end 130 of the other end of this flexible member 16 and the second sheet metal 13 is electrically connected, thereby the second sheet metal 13 obtains the voltage that this second electrode 15 provides.This inductive layer 18 is formed in the space between the first sheet metal 12 and the flexible member 16.In the present embodiment, this inductive layer 18 in body 11 footpath upwards the length that directly makes progress at body of the length of (i.e. the direction of 11 second ends 111 from first end 110 to body) and the first sheet metal 12 be used for the conducting medium that filling has a specific inductive capacity about equally.When this flexible member 16 was in initial position, this first sheet metal 12 was a predetermined value with the second sheet metal 13 relative areas, and in the present embodiment, this predetermined value is zero.This body 11 also comprises the first side wall 112 and the second sidewall 113, and this first end 110 and the second end 111 are arranged between the first side wall 112 and the second sidewall 113.This auxiliary spring 17 comprises the first auxiliary spring 170 and the second auxiliary spring 171, be fixedly connected with the second sidewall 113 with the first side wall 112 of this body 11 respectively, and form a passage 172 between this first auxiliary spring 170 and the second auxiliary spring 171, this second sheet metal 13 is contained in this passage 172.When pressing the free end 131 of this second sheet metal 13, this second sheet metal 13 can be in this passage 172 relatively this first sheet metal 12 near or away from.
See also Fig. 2, particularly, when pressing the free end 131 of the second sheet metal 13, this second sheet metal 13 moves and compression elastic element 16 to the direction near the first sheet metal 12, and when these second sheet metal, 13 lasting directions to close the first sheet metal 12 are moved, its area relative with the first sheet metal 12 is increased gradually by zero, thereby form an inductance capacitance in the first sheet metal 12 part relative with the second sheet metal 13.The conducting medium that this inductive layer 18 is filled is used for strengthening this inductance capacitance.The part relative with the second sheet metal 13 along with free end 131, the first sheet metals 12 that continue to press the second sheet metal increases, and the capacitance of the inductance capacitance of formation also increases thereupon.When making them just all in the admission passages 172 when continuing to press this free end 131, and so that press the object of this free end 131 and contact with auxiliary spring 17, this object can be pressed this free end 131 and continue to move to the direction near first end 110 by compressing the first auxiliary spring 170 and the second auxiliary spring 171, so that the first sheet metal 12 part relative with the second sheet metal 13 continues increase.When removing pressure, when getting back to initial position owing to the elastic-restoring force of auxiliary spring 17 and flexible member 16, this second sheet metal 13 returns to initial position, the area that this first sheet metal 12 is relative with the second sheet metal 13 reverts to initial null value, thereby do not form this inductance capacitance, that is, the inductance capacitance value is kept to zero.
See also Fig. 3, be the high-level schematic functional block diagram of the writing pencil that is applied to an electronic installation, this writing pencil 20 comprises that this capacitive forced induction element 10(calls sensing element 10 in the following text), positioning unit 21, control module 22, communication unit 23 and storage unit 24.Wherein, the second sheet metal 13 of this sensing element 10 nib of can be used as this writing pencil is write at display screen.This storage unit 24 is used for the coordinate system corresponding to display screen (not shown) of pre-stored this electronic installation 30, and this coordinate system can set in advance when dispatching from the factory, every writing pencil 20 corresponding electronic installations 30.This coordinate system can also upgrade setting by the user in use, that is, this writing pencil 20 can obtain the coordinate system of the electronic installation 30 that needs the coupling use, and the coordinate system of storage in the updated stored unit 24.This electronic installation 30 comprises processing unit 31, communication unit 32 and display unit 33.
When this writing pencil 20 contacts and presses with the display screen (not shown) of this electronic installation 30, namely, this second sheet metal 13 contacts and is subject to the pressure of display screen with display screen, this sensing element 10 correspondingly produces an inductance capacitance owing to being under pressure, 21 pairs of this writing pencil 20 current positions, triggered location unit were detected when this control module 22 detected the inductance capacitance that is produced by sensing element 10, to obtain corresponding positional information.In the present embodiment, this positioning unit 21 is a gyroscope, can detect and obtain coordinate values and the sense of displacement of these writing pencil 20 current locations.This control module 22 obtains the coordinate system of storage in the storage unit 24, determines that according to the positional information that positioning unit 21 is determined this positional information is positioned at the coordinate of this coordinate system, and the positional information that control communication unit 23 will be determined is sent to electronic installation 30.
When this electronics 11 receives the positional information that is sent by writing pencil 20 by communication unit 32, processing unit 31 is determined the position that writing pencil 20 contacts with the display screen of this electronic installation 30 according to this positional information, and control display unit 33 shows the position that this is determined simultaneously.So, this writing pencil 20 continues to contact with the display screen of this electronic installation 30 and when moving according to certain track, the display unit 33 of this electronic installation 30 can show this track.
Use above-mentioned writing pencil and capacitive forced induction element thereof, contact with an electronics by writing pencil and to press this writing pencil, so that this capacitive forced induction element produces corresponding inductance capacitance owing to the variation of pressure, this writing pencil is detected its current location when producing inductance capacitance, and shown by electronic installation and the current location of this writing pencil realize the writing pencil hand-write input function.Utilize capacitive forced induction element of the present invention to solve the flimsy problem of electronic installation working pressure sensor in the prior art.
Be understandable that, for the person of ordinary skill of the art, can make other various corresponding changes and distortion by technical conceive according to the present invention, and all these change the protection domain that all should belong to claim of the present invention with distortion.
Claims (13)
1. a writing pencil comprises control module and communication unit, and described communication unit is used for communicating to connect with an electronic installation with display screen, it is characterized in that, described writing pencil also comprises:
The capacitive forced induction element, comprise body, be arranged at described body first end and the first electrode that is connected with negative pole with a positive source respectively and the second electrode, with the first sheet metal, flexible member and the second sheet metal that described the first electrode is electrically connected, described flexible member is electrically connected between described the second electrode and described the second sheet metal; When described flexible member is in initial position, the area that described the first sheet metal is relative with described the second sheet metal is a predetermined value, when the free end of described the second sheet metal is contacted with described display screen, described the second sheet metal is under pressure and near the motion of the direction of described body first end and compress described flexible member, make described the first sheet metal area change relative with described the second sheet metal and greater than described predetermined value, thereby between described the first sheet metal and described the second sheet metal opposite face, form an inductance capacitance;
Positioning unit is used for responding that described control module detects the inductance capacitance that described capacitive forced induction element produces and the trigger pip that produces and to detecting the current position of described writing pencil, to obtain positional information;
Storage unit is for the coordinate system corresponding to display screen of pre-stored described electronic installation;
Described control module is used for obtaining the coordinate system that described storage unit is stored, and determines that according to the positional information that described positioning unit is determined described positional information is positioned at the coordinate of described coordinate system;
Described communication unit also sends described coordinate to described electronic installation for the control that responds described control module, triggers described electronic installation and determines the position that described writing pencil contacts with described display screen according to described coordinate, and show described position.
2. writing pencil as claimed in claim 1 is characterized in that, described positioning unit is a gyroscope, is used for detecting and obtaining coordinate values and the sense of displacement of described writing pencil current location.
3. writing pencil as claimed in claim 1, it is characterized in that, described capacitive forced induction element also comprises the inductive layer of a filled conductive medium, be formed between described the first sheet metal and the described flexible member, be used for strengthening the inductance capacitance that produces between described the first sheet metal and described the second sheet metal opposite face.
4. writing pencil as claimed in claim 3 is characterized in that, described inductive layer is identical with described the first sheet metal length in the length of the direction of described body along described first end to described the second end.
5. writing pencil as claimed in claim 1, it is characterized in that, described predetermined value is zero, when described writing pencil breaks away from described display screen, described flexible member is returned to initial position, the area that described the first sheet metal is relative with described the second sheet metal reverts to described predetermined value, and described inductance capacitance value is kept to zero.
6. writing pencil as claimed in claim 1, it is characterized in that, described capacitive forced induction element also comprises the first auxiliary spring and the second auxiliary spring, the first side wall relative with described body is fixedly connected with the second sidewall respectively, and form a passage between described the first auxiliary spring and the second auxiliary spring, described the second sheet metal is contained in the described passage.
7. writing pencil as claimed in claim 6, it is characterized in that, when described the second sheet metal is continued to press and is entered described passage fully, described display screen contacts with the second auxiliary spring with described the first auxiliary spring, and compress described the first auxiliary spring and the second auxiliary spring and make described the second sheet metal continue to continue motion to the direction near described body first end, make the area change of described the first sheet metal and the second sheet metal opposite face, the inductance capacitance value of described generation increases thereupon.
8. capacitive forced induction element, comprise body and the first electrode and the second electrode that are connected described body first end and are connected with negative pole with a positive source respectively, it is characterized in that, described capacitive forced induction element also comprises the first sheet metal that is electrically connected with described the first electrode, flexible member and the second sheet metal, described flexible member is electrically connected between described the second electrode and described the second sheet metal, when described flexible member is in initial position, the area that described the first sheet metal is relative with described the second sheet metal is a predetermined value, when an object is pressed the free end of described the second sheet metal and made described the second sheet metal to moving near the direction of described body first end and compressing described flexible member, make described the first sheet metal area change relative with described the second sheet metal and greater than described predetermined value, thereby between described the first sheet metal and described the second sheet metal opposite face, form an inductance capacitance.
9. capacitive forced induction element as claimed in claim 8, it is characterized in that, the inductive layer that also comprises a filled conductive medium, be formed between described the first sheet metal and the described flexible member, be used for strengthening the inductance capacitance that produces between described the first sheet metal and described the second sheet metal opposite face.
10. capacitive forced induction element as claimed in claim 9 is characterized in that, described inductive layer is identical with described the first sheet metal length in the length of the direction of described body along described first end to described the second end.
11. capacitive forced induction element as claimed in claim 8, it is characterized in that, described predetermined value is zero, when removing the object of pressing described the second sheet metal, described flexible member is returned to initial position, the area that described the first sheet metal is relative with described the second sheet metal reverts to described predetermined value, and described inductance capacitance value is kept to zero.
12. capacitive forced induction element as claimed in claim 8, it is characterized in that, also comprise the first auxiliary spring and the second auxiliary spring, the first side wall relative with described body is fixedly connected with the second sidewall respectively, and form a passage between described the first auxiliary spring and the second auxiliary spring, described the second sheet metal is contained in the described passage.
13. capacitive forced induction element as claimed in claim 12, it is characterized in that, when described the second sheet metal is continued to press and is entered described passage fully, described object contacts with the second auxiliary spring with described the first auxiliary spring, and compress described the first auxiliary spring and the second auxiliary spring and make described the second sheet metal continue to continue motion to the direction near described body first end, make the area change of described the first sheet metal and the second sheet metal opposite face, the inductance capacitance value of described generation increases thereupon.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103178257A CN102880318A (en) | 2012-08-31 | 2012-08-31 | Handwriting pen and capacitive pressure sensing element thereof |
| TW101133214A TW201409291A (en) | 2012-08-31 | 2012-09-12 | Stylus and capacitive pressure sensing element employed therein |
| US13/654,627 US20140062967A1 (en) | 2012-08-31 | 2012-10-18 | Stylus and capacitive pressure sensing element employed therein |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103178257A CN102880318A (en) | 2012-08-31 | 2012-08-31 | Handwriting pen and capacitive pressure sensing element thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102880318A true CN102880318A (en) | 2013-01-16 |
Family
ID=47481678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012103178257A Pending CN102880318A (en) | 2012-08-31 | 2012-08-31 | Handwriting pen and capacitive pressure sensing element thereof |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20140062967A1 (en) |
| CN (1) | CN102880318A (en) |
| TW (1) | TW201409291A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103399653A (en) * | 2013-07-19 | 2013-11-20 | 深圳超多维光电子有限公司 | Telescopic device, operating bar and measurement method |
| CN104076912A (en) * | 2013-03-26 | 2014-10-01 | 佛山市顺德区顺达电脑厂有限公司 | Intelligent pen type electronic device |
| CN111990983A (en) * | 2020-08-31 | 2020-11-27 | 平安国际智慧城市科技股份有限公司 | Heart rate monitoring method, intelligent pen, terminal and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8978487B2 (en) * | 2012-12-13 | 2015-03-17 | Blackberry Limited | Capacitive force sensor with magnetic spring |
| US9304609B2 (en) * | 2013-03-12 | 2016-04-05 | Lenovo (Singapore) Pte. Ltd. | Suspending tablet computer by stylus detection |
| US9933867B2 (en) | 2015-12-30 | 2018-04-03 | Synaptics Incorporated | Active pen capacitive displacement gauge |
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Also Published As
| Publication number | Publication date |
|---|---|
| TW201409291A (en) | 2014-03-01 |
| US20140062967A1 (en) | 2014-03-06 |
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Application publication date: 20130116 |